Pascal (Lazarus/Delphi)

Examine HTTP Response Status Code and Text

See more REST Examples

Demonstrates how to examine the HTTP response status code and text when using the REST object. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Rest;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  responseText: string;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  rest := TRest.Create;

  //  We're going to check https://authenticationtest.com/HTTPAuth/
  bTls := True;
  port := 443;
  bAutoReconnect := True;
  success := rest.Connect('authenticationtest.com',port,bTls,bAutoReconnect);
  if (success <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  //  Send a GET request
  responseText := rest.FullRequestNoBody('GET','/HTTPAuth/');
  if (rest.LastMethodSuccess <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  //  The start line of an HTTP response, called the status line, contains the following information:
  //  
  //      The protocol version, usually HTTP/1.1.
  //      A status code, indicating success or failure of the request. Common status codes are 200, 404, or 302
  //      A status text. A brief, purely informational, textual description of the status code to help a human understand the HTTP message.
  //  
  //  A typical status line looks like: HTTP/1.1 404 Not Found.

  //  The ResponseStatusCode property contains the integer response code:
  WriteLn('Response status code = ' + rest.ResponseStatusCode);

  //  The ResponseStatusText property contains the text (if any) that follows the status code on the status line.
  WriteLn('Response status text = ' + rest.ResponseStatusText);

  //  In this case, the sample output is:
  //  
  //  Response status code = 401
  //  Response status text = Unauthorized


  rest.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.